2904.99 - Other:

This HTS category, 2904.99, encompasses sulfonated, nitrated, or nitrosated derivatives of hydrocarbons that do not fall under more specific subheadings within heading 2904. This includes a broad range of organic compounds characterized by the presence of nitro (-NO2), nitroso (-NO), or sulfonic acid (-SO3H) groups, or their halogenated variants, attached to a hydrocarbon backbone. The "Other" designation signifies that these compounds are not specifically enumerated in preceding subheadings of 2904, such as those dedicated to specific compounds like trichloronitromethane.

Distinguishing 2904.99 from its sibling, 2904.91.00.00 (Trichloronitromethane), is crucial. While trichloronitromethane is a specific halogenated nitro-hydrocarbon, this category captures a wider array of compounds that, while also derivatives of hydrocarbons with sulfonation, nitration, or nitrosation, are not exclusively trichloronitromethane. The classification hinges on the specific chemical structure and the absence of a more precise HTS classification elsewhere within heading 2904.

Within the "Other" category, further subdivisions exist to classify more specific types of sulfonated, nitrated, or nitrosated hydrocarbon derivatives. These include specific mononitrobenzenes, nitrotoluenesulfonic acids, and other bromo- or chloro-nitrobenzene compounds, as well as distinct compounds like 4,4'-dinitrostilbene-2,2'-disulfonic acid. The existence of these subcategories allows for greater precision in classification based on the precise chemical composition and functional groups present.